fix(deps): Resolve all npm audit vulnerabilities (#3199)

Update dependencies and add overrides to fix security vulnerabilities:

Root package:
- Bump protobufjs ^7.3.0 -> ^7.5.5 (critical: arbitrary code execution)
- Add overrides for fast-xml-parser, serialize-javascript, picomatch,
  flatted, brace-expansion, yaml, underscore, lodash, minimatch

demos/browser:
- Bump vite ^7.3.1 -> ^7.3.2 (high: path traversal, WebSocket read)
- Bump lodash ^4.17.20 -> ^4.17.24 (high: prototype pollution)
- Add overrides for fast-xml-parser, picomatch

integration:
- Bump mocha ^10.2.0 -> ^10.8.2
- Add overrides for fast-xml-parser, serialize-javascript, picomatch,
  brace-expansion

All three directories now report 0 vulnerabilities from npm audit.
Addresses all open dependabot PRs for these packages.

Author: hensmi-amazon